Evaluate
2x\left(x+15\right)
Expand
2x^{2}+30x
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5\left(-x\right)x-2\left(-x\right)+7x\left(x+4\right)
Use the distributive property to multiply -x by 5x-2.
5\left(-x\right)x+2x+7x\left(x+4\right)
Multiply -2 and -1 to get 2.
5\left(-x\right)x+2x+7x^{2}+28x
Use the distributive property to multiply 7x by x+4.
5\left(-x\right)x+30x+7x^{2}
Combine 2x and 28x to get 30x.
-5xx+30x+7x^{2}
Multiply 5 and -1 to get -5.
-5x^{2}+30x+7x^{2}
Multiply x and x to get x^{2}.
2x^{2}+30x
Combine -5x^{2} and 7x^{2} to get 2x^{2}.
5\left(-x\right)x-2\left(-x\right)+7x\left(x+4\right)
Use the distributive property to multiply -x by 5x-2.
5\left(-x\right)x+2x+7x\left(x+4\right)
Multiply -2 and -1 to get 2.
5\left(-x\right)x+2x+7x^{2}+28x
Use the distributive property to multiply 7x by x+4.
5\left(-x\right)x+30x+7x^{2}
Combine 2x and 28x to get 30x.
-5xx+30x+7x^{2}
Multiply 5 and -1 to get -5.
-5x^{2}+30x+7x^{2}
Multiply x and x to get x^{2}.
2x^{2}+30x
Combine -5x^{2} and 7x^{2} to get 2x^{2}.
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Simultaneous equation
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\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
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Limits
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